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“Rain is expected in many places with thunderstorms, in some places it will rain a lot, hail will fall. In some places there will be a splash of 15-20 m / s, in some places up to 25 m / s.
The storm will continue in the first half of next night ”, we wrote in the official facebook account of the meteo.lt service
According to the website of the Lithuanian Hydrometeorological Service, the atmospheric front will move slowly through Lithuania the next day. Stormy weather is expected.
On the night of June 24, short showers and thunderstorms are expected in many places. In some places it will fall heavily. Hail can occur in some places, hail is possible. Unstable wind, from 5 to 10 m / s, with gusts of 15 to 20 m / s. The lowest temperature is 15-20 degrees.
During the day in many places brief showers with thunderstorms. In the eastern areas there will be heavy rains, hail and splinters. The wind changes direction, 6–11 m / s, through the fissure 15–20 m / s. The highest temperature is 26 to 31 degrees, in the extreme west of the country 23 to 25 degrees.
June 25 in many places brief rains, thunderstorms, in places are strong. Wind around gusts, 5–10 m / s, during thunder gusts 15–17 m / s. Temperature at night 14-19, during the day 24-29 degrees.
On the night of June 26, thunderstorms in many places during the day. Temperature at night 14-19, during the day 22-27 degrees.
On June 27, in the southwest areas briefly with thunderstorms. At night in foggy places. Temperature from 12 to 17 degrees at night and from 21 to 26 degrees during the day.
June 28 in places with brief rains, possible storm. Temperature of 10 to 15 degrees at night and 20 to 25 degrees during the day.
Does it really rain every year through Jonines?
Popular wisdom testifies that it always rains through the Jonines. Is it really the case? Let’s answer this question by looking at the mean air temperature and precipitation between 1991 and 2020.
When analyzing the last two weeks of June, it is observed that during Saint John’s Day (June 23-24), the average annual rainfall in Lithuania is 4 to 5 mm, which is up to 2 times more rain per day than before. and after the day of San Juan. Also, these days are about 0.5 ° C cooler than the day before and after.
Often not just Joninė itself, but a longer period of time can also occur in wetter and cooler conditions (see graph below). According to perennial values, the period of highest rainfall continues after Joniniai, almost until mid-July. The rainy period also includes July 10, which is popularly known as the “Seven Sleeping Brothers” or simply the “Sleeping Brothers.”
It is said that if it rains on this day, it will increase for another seven days or even seven weeks. This observation doesn’t always “work”, but we’ll tell you about it when we get there today.
The ionic period is also characterized by lower air temperatures than before and after. Average air temperature is June 23-24. In Lithuania it reaches about 15.8 C, but the days before and after are warmer.
If it really does rain through Jonines, as people say, we can check using not only the average precipitation values on these days, but the recurrence of rainy days (> 0.1mm) for 30 years.
On average in Lithuania on June 23 and 24. Most of the time it rains, but the saying “it always rains in Jonines” is not correct, since the recurrence of rainfall reaches 58% (17 out of 30 years) and 64% (19 out of 30 years), respectively. The recurrence of precipitation is known to be highly location dependent. June 23 rainfall is more frequent on the coast, central and northern Lithuania (60–64%; see map) and on June 24. – in the north, center and south-west of Lithuania (66–74%).
We have already discovered that the St. John’s period is characterized by increased recurrence of rainfall and cooler conditions. But why is that? It is not exactly known that these two days are so differentiated in terms of temperature and precipitation in multiannual sequences, but this is mainly due to a more intense cyclonic circulation. The length of the day around Jonines is the longest of the whole year, which is why the Sun strongly heats the earth. Strong warming is often associated with intensification of low pressure atmospheric circulation and cyclonic and frontal activity.
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